If you are looking for a good course check out Alibaba- making large margins… on similar title. It is on Udemy and I paid £7.99. Best course I’ve tested. Tip; check out the course on mobile, web browser and iPad etc as they optimise the pricing up and down. I think I purchased via iPhone but took the course on my laptop (original price was about £300) Also, check out the ebook on importdojo.com
Between the two of them they just about cover everything you need to know.

Make sure to inspect quality before sending to customer. Dropshipping will need merchant-fulfillment approach so you will remain at disadvantage when selling same product with other seller who uses FBA and sells same product.